Wire harness is more of a basic outer coating, covering the smaller wires and cables inside. The role of the wire harness is to bundle the cables and wires that have been protected by the outer layer. This basically means that if you open a harness, you will see many cables with their own covering instead of a single wire. Wire harness manufacturers have been using thermoplastics and thermosetting materials to make wire harnesses for many years. These materials will help protect the wires from environmental conditions.
